These ghoulish vampire sub-types were found in Ireland and parts of Great Britain before their Christian conversion. During that time, all Dearg-duls were wiped out. Some Church historians claims these are “snakes” that St. Patrick drove from Ireland’s shores. In any case, no one has seen one in nearly 1,000 years. Until today that is (aren’t you the luck one).
Dearg-dues are basically animalistic predators. They are not intelligent, but may be controlled to a slight degree by a sufficiently powerful sorcerer (Magic/Sorcery 4+). They hunt in packs of three or more. The creatures prefer the taste of fresh blood like all vampires, but they are not above raiding a tomb for food. Their eyes glow amber-red and they look like ragged, blue tinged corpses.
For the most part, Dearg-dues have the same powers and vulnerabilities as your garden variety vampires. What sets these little nasties off is that a stake to the heart (sufficient to drop them below zero Life Points) does not kill them. It stops them, but they don’t turn to dust. Their only goal at that point is to reach out feebly and remove the stake. Once that is done, they recover normally (normally for a vampires, that is) and come back for more. The only way to kill them permanently is by piling stones on top of them. Once every part of their body is covered, they are destroyed.
Dearg-dues can’t effectively make more of their own kind, but once in a while (1 on a d10) a victim drained by a Dearg-due will rise as one.